Theodor erhard



(No Model.)

T. E'RHARD.

GALVANIG BATTERY.

UNITED STATES PATENT OFFICE.

THEoDon Entrano, or STUTTGART, wnTEMBEnG, GERMANY.

GLVANIC BATTERY.

SPECIFICATION forming part of Letters Patient No. 346,032, dated July20, 1886.

A Application lcd September 10, 1885. Serial No. 176,745. '(No model.)

To @ZZ whom t may concern,.-

Be it known that I, TnEoDoR ERHARD, a citizen of Germany, residing atStuttgart, Wrtemberg, Germany, have invented certain new and usefulImprovements in Galvanic Batteries, of which the followingis aspecication.

My invention relates to a novel construction of a galvanic battery,whereby the best possible effect may be producedv without theemploynient of acids. l

The invention will rst be described with reference to the drawings, andthenpointed out in the claims.

Figure l represents a vertical sectional View of my improvedbattery,taken on the line b c of Fig. 3. Fig. 2 is a similar sectional viewtaken on the line d e of Fig. 3. Fig. 3 is a transverse sectional Viewtaken on the line a b of Fig. 2.

In the drawings, the letter A indicates the elements of the battery,which are grouped together after the manner of a voltaic pile, and arecombined and arranged as follows: Upon a wooden plate, w, I place a zincplate, e, to which is attached a negative polar wire. (Not shown.)' Uponthe zinc plate I place a diaphragm, d, of parchment-paper, and upon thisthe insulatingframe f, made of pressed cork or papier-mache. Upon thisframe I place a leaden sheet, l, connected with a zinc plate,z, in sucha manner that the leaden sheet will lie on the insulating-frame f. Onthis zinc plate I place another diaphragm d, and upon it anotherinsuiating-framef, and so on, closing the pile with a leaden sheetbacked by a zinc plate, a polar wire (not shown) being soldered to thesaid leaden sheet. After a sufficient number of elements have been thusarranged I put on another wooden plate, w, which (as also is thefirst-mentioned wooden plate) is provided with atlange, w. The woodenplates are then drawn toward each other by means of screw-bolts w2firmly pressing the elements and insulatingframes in such a manner thatthe cells between the elements are rendered water-tight. These boltspass in front, in rear, and below the elements, care being taken tolocate them a sufficient distance from the elements to avoid a shortcircuit. The battery thus formed is pro vided with an outer casing, A.

F, through which to charge the chamber. The

space between the foraminons partitions D D is filled or partiallyfilled with crystals E of the exciting salt-say sulphate of copper-'andthe battery-chambers are filled with water, so that the solution willstand at the level indicated by the letters a; m in Figs. l and 2,whenthe battery is in an upright position.

Chamber B is braced by means of rods H extending from bottom to top, asshown. The bottom piece of this chamber is flanged, as at b', theflanges corresponding to those on the wooden plates of the lowerchamber, and theA two chambers are secured together by means of clampsG, engaging with their flanges, as shown, a strip of suitable packing,as p, being inserted between the chambers to insure a tight joint.

In using this battery, when the solution in the cells has becomedecomposed and 10st its effect it may be renewed by inverting thebattery for awhile, and then restoring it to its normal position, thesolutionrin the upper chamber supplying that of the waste solutionbelow. Vhen it is desired to put the battery out of operation, all thatis necessary is to invert it and leave it in that position,when, therebeing no solution in the cells, there will be no action on the elements.Then the battery is inverted, the salts will be held above the solutionby the foraminous partition 'Dl Having thus described my invention, whatI claim as new, and desire to secure by Letters Patent, is-

l. The combination, with the lower chamber composed of a series ofelectrodes and intervening partition-frames, forming cells for theexciting solution, secured together in any suitable manner, of the upperchamber provided with foraminous partitions, forming recepta- IOO thesolution and for the salt, and anged on its bottoni, and suitable clampsfor engaging 15 with the flanges on both chambers to bind said chambersfirmly together, substantially as specified.

In testimony whereof I hereunto sign my naine7 in the presence of twosubscribing wit- 2o nesses, this 15th day of June, 1885.

THEODOR ERI-IARD.

Vitnesses:

ALVIN KUNZ, GOTTLIEB SEINZEN.

